U.S. patent application number 16/134186 was filed with the patent office on 2019-03-21 for corrugated cardboard plant.
The applicant listed for this patent is BHS Corrugated Maschinen- und Anlagenbau GmbH. Invention is credited to Berthold AUMULLER, Helmut KRAUS, Maximilian MARK, Norbert STADELE.
Application Number | 20190084287 16/134186 |
Document ID | / |
Family ID | 63490274 |
Filed Date | 2019-03-21 |
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United States Patent
Application |
20190084287 |
Kind Code |
A1 |
AUMULLER; Berthold ; et
al. |
March 21, 2019 |
CORRUGATED CARDBOARD PLANT
Abstract
The invention relates to a corrugated cardboard plant for
producing corrugated cardboard. The corrugated cardboard plant
comprises at least one device for producing a respective corrugated
cardboard web laminated on one side from a respective cover web and
a respective material web; a lamination web dispensing device for
dispensing a lamination web; a lamination web printing assembly,
disposed downstream of the lamination web dispensing device, for
imprinting the lamination web; and a device, disposed downstream of
the lamination web printing assembly, for producing a corrugated
cardboard web laminated on two sides from the at least one
corrugated cardboard web laminated on one side and the lamination
web.
Inventors: |
AUMULLER; Berthold; (Weiden,
DE) ; KRAUS; Helmut; (Wackersdorf, DE) ; MARK;
Maximilian; (Tirschenreuth, DE) ; STADELE;
Norbert; (Parkstein, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BHS Corrugated Maschinen- und Anlagenbau GmbH |
Weiherhammer |
|
DE |
|
|
Family ID: |
63490274 |
Appl. No.: |
16/134186 |
Filed: |
September 18, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B31F 1/285 20130101;
B32B 37/20 20130101; B32B 38/145 20130101; B32B 39/00 20130101;
B32B 37/12 20130101; B31F 1/2818 20130101; B31F 1/2813 20130101;
B31F 1/2822 20130101; B32B 2317/127 20130101; B31F 1/28
20130101 |
International
Class: |
B32B 39/00 20060101
B32B039/00; B32B 38/00 20060101 B32B038/00; B32B 37/12 20060101
B32B037/12; B32B 37/20 20060101 B32B037/20 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 21, 2017 |
DE |
10 2017 216 720.3 |
Claims
1. A corrugated cardboard plant for producing corrugated cardboard,
comprising a) at least one device (4, 16) for producing a
respective corrugated cardboard web (5, 17) laminated on one side
from a respective cover web and a respective material web; b) a
lamination web dispensing device (27) for dispensing a lamination
web (30); c) a lamination web printing assembly (31), disposed
downstream of the lamination web dispensing device (27), for
imprinting the lamination web (30); and d) a device (55), disposed
downstream of the lamination web printing assembly (31), for
producing a corrugated cardboard web (1) laminated on two sides
from the at least one corrugated cardboard web (5, 17) laminated on
one side and the lamination web (30).
2. The corrugated cardboard plant according to claim 1, wherein the
at least one device (4, 16) for producing a respective corrugated
cardboard web (5, 17) laminated on one side, and the lamination web
dispensing device (27), and the lamination web printing assembly
(31) are disposed in one row.
3. The corrugated cardboard plant according to claim 2, wherein the
at least one device (4, 16) for producing a respective corrugated
cardboard web (5, 17) laminated on one side, and the lamination web
dispensing device (27), and the lamination web printing assembly
(31) are disposed in one row in a conveying direction (3) of the
corrugated cardboard plant.
4. The corrugated cardboard plant according to claim 1, wherein the
lamination web printing assembly (31) is disposed below a bridge
(15) for guiding the at least one corrugated cardboard web (5, 17)
laminated on one side in a direction towards the device (55) for
producing a corrugated cardboard web (1) laminated on two
sides.
5. The corrugated cardboard plant according to claim 4, wherein the
bridge (15) comprises at least one shield assembly for reducing a
drying-up of the at least one corrugated cardboard web (5, 17)
laminated on one side that is guided in the bridge (15).
6. The corrugated cardboard plant according to claim 5, wherein the
at least one shield assembly comprises at least one of the group
comprising at least one side wall and at least one cover.
7. The corrugated cardboard plant according to claim 1, wherein a
bridge (15) has a web run correction assembly (51) for correcting a
web run of the at least one corrugated cardboard web (5, 17)
laminated on one side in the bridge (15), wherein the web run
correction assembly (51) has a smaller horizontal spacing from the
device (55) for producing a corrugated cardboard web (1) laminated
on two sides than the lamination web printing assembly (31).
8. The corrugated cardboard plant according to claim 1, comprising
a reversing assembly (64) for directing a print side (36) of the
lamination web (30) downwards, wherein the reversing assembly (64)
is disposed downstream of the lamination web printing assembly (31)
and upstream of the device (55) for producing a corrugated
cardboard web (1) laminated on two sides.
9. The corrugated cardboard plant according to claim 8, wherein the
reversing assembly (64) has at least one vertically running
reversing bar.
10. The corrugated cardboard plant according to claim 9, wherein
the vertically running reversing bar is horizontally displaceable
for correcting a web run of the lamination web (30).
11. The corrugated cardboard plant according to claim 1, comprising
at least one re-humidification device (46) for re-humidifying the
lamination web (30), wherein the re-humidification device (46) is
disposed downstream of the lamination web printing assembly (31)
and upstream of the device (55) for producing a corrugated
cardboard web (1) laminated on two sides.
12. The corrugated cardboard plant according to claim 1, comprising
a gluing unit (54) for gluing the at least one corrugated cardboard
web (5, 17) laminated on one side with glue, wherein the gluing
unit (54) is disposed downstream of the lamination web printing
assembly (31) and adjacent to the lamination web printing assembly
(31).
13. The corrugated cardboard plant according to claim 12, wherein
the gluing unit (54) is disposed directly adjacent to the
lamination web printing assembly (31).
14. The corrugated cardboard plant according to claim 12, wherein
the gluing unit (54) is disposed so that the lamination web
printing assembly (31) heats the lamination web (30) in such a
manner that the glue applied by the gluing unit (54) bonds.
15. The corrugated cardboard plant according to claim 12, wherein
the glue used in the gluing unit (54) permits processing
temperatures of below 70.degree. C.
16. The corrugated cardboard plant according to claim 1, wherein
the lamination web printing assembly (31) heats the lamination web
(30) in such a manner that said lamination web (30) in the device
(55) for producing a corrugated cardboard web (1) laminated on two
sides is connectable in a glued manner to the adjacent corrugated
cardboard web (17) laminated on one side.
17. The corrugated cardboard plant according to claim 1, comprising
at least one heat protection assembly (43) for protecting a
lamination printing device (41) of the lamination web printing
assembly (31) against thermal input.
18. The corrugated cardboard plant according to claim 1, comprising
a lamination web run correction installation (38) for correcting a
web run of the lamination web (30).
19. The corrugated cardboard plant according to claim 18, wherein
the lamination web run correction installation (38) comprises at
least one pivotable pivot roller.
20. The corrugated cardboard plant according to claim 18, wherein
the web run correction installation (38) is disposed downstream of
a pre-coating application device (35).
21. A method for producing corrugated cardboard, comprising the
step of applying glue by means of a gluing unit (54) to free tips
of at least one corrugated cardboard web (5, 17) laminated on one
side for connecting the latter in a glued manner to a further web
(17, 5, 30) for forming a corrugated cardboard web (1) laminated on
two sides, wherein the glue permits processing temperatures of
below 70.degree. C.
22. The method for producing corrugated cardboard according to
claim 21, wherein said processing temperatures of below 70.degree.
C. are present at least on one of the group comprising the at least
one corrugated cardboard web (5, 17) laminated on one side and the
lamination web (30).
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority of German Patent
Application Serial No. DE 10 2017 216 720.3, filed on Sep. 21,
2017, pursuant to 35 U.S.C. 119(a)-(d), the content of which is
incorporated herein by reference in its entirety as if fully set
forth herein.
FIELD OF THE INVENTION
[0002] The invention relates to a corrugated cardboard plant and to
a method for producing corrugated cardboard.
BACKGROUND OF THE INVENTION
[0003] Corrugated cardboard plants having printing assemblies for
imprinting webs are generally known from the prior art by way of
obvious prior use. The quality of the imprint by the printing
assemblies is however unsatisfactory in many instances.
SUMMARY OF THE INVENTION
[0004] The invention is based on the object of achieving a
corrugated cardboard plant having a printing assembly which
requires a comparatively small space. Furthermore, the printing
quality and the corrugated cardboard quality, respectively, are to
be particularly high. A respective production method is likewise to
be provided.
[0005] This object is achieved according to the invention by a
corrugated cardboard plant for producing corrugated cardboard,
comprising at least one device for producing a respective
corrugated cardboard web laminated on one side from a respective
cover web and a respective material web; a lamination web
dispensing device for dispensing a lamination web; a lamination web
printing assembly, disposed downstream of the lamination web
dispensing device, for imprinting the lamination web; and a device,
disposed downstream of the lamination web printing assembly, for
producing a corrugated cardboard web laminated on two sides from
the at least one corrugated cardboard web laminated on one side and
the lamination web.
[0006] Furthermore, this object is achieved according to the
invention by a method for producing corrugated cardboard,
comprising the step of applying glue by means of a gluing unit to
free tips of at least one corrugated cardboard web laminated on one
side for connecting the latter in a glued manner to a further web
for forming a corrugated cardboard web laminated on two sides,
wherein the glue permits processing temperatures of below
70.degree. C., said temperatures favourably being present at least
on the at least one corrugated cardboard web laminated on one side
and/or on the lamination web.
[0007] The core concept of the corrugated cardboard plant according
to the invention lies in that the lamination web printing assembly
is disposed between a lamination web dispensing device and a device
for producing a corrugated cardboard web laminated on two sides or
both sides, respectively. The lamination web printing assembly in
operation imprints the conveyed, in particular continuous,
lamination web on at least one print side. The lamination web
preferably is, or remains, respectively, a smooth non-corrugated
web. The corrugated cardboard web laminated on two sides has at
least three plies, preferably three plies, five plies, or seven
plies.
[0008] The lamination web printing assembly is advantageously
configured as a digital printing assembly, in particular an ink jet
printing assembly. Said lamination web printing assembly is
preferably retro-fittable. Alternatively, other known printing
assemblies can be used.
[0009] The lamination web printing assembly is in particular
capable of imprinting at least one alphabetic letter, a numeral, or
any other sign, a graph and/or a photograph on the lamination web.
A paint or printing ink, respectively, is favourably used to this
end. It is advantageous for the lamination web printing assembly to
be capable of multi-colour printing.
[0010] The lamination web printing assembly favourably has a
plurality of printing heads which are disposed in a cascading
manner in the transverse direction of the lamination web. The
lamination web printing assembly preferably has a plurality of rows
of printing heads that are disposed behind one another. It is
advantageous for the lamination web to be imprinted, when imprinted
in the lamination web printing assembly, to be guided over a
printing cylinder or a central cylinder, respectively. The printing
cylinder preferably extends horizontally and perpendicularly to a
conveying direction of the lamination web.
[0011] The device for producing an in particular continuous
corrugated cardboard web laminated on one side favourably comprises
a grooving installation for grooving a material web to be
corrugated, while forming a corrugated web.
[0012] It is advantageous for the device for producing a corrugated
cardboard web laminated on one side to have a glue application
installation for gluing the corrugated web.
[0013] A cover web dispensing device favourably dispenses the cover
web. It is advantageous for the cover web dispensing device to be
configured as a splicing device for providing a continuous cover
web.
[0014] It is expedient for the device for producing a corrugated
cardboard web laminated on one side to moreover comprise a contact
pressure installation for pressing the cover web against the
corrugated web provided with glue.
[0015] A material web dispensing device preferably dispenses the
material web. The material web dispensing device is favourably
configured as a splicing device for providing a continuous material
web.
[0016] The lamination web dispensing device is preferably
configured as a splicing device for providing a continuous
lamination web.
[0017] The device for producing a corrugated cardboard web
laminated on two sides favourably connects the at least one
corrugated cardboard web laminated on one side to the lamination
web. Said device for producing a corrugated cardboard web laminated
on two sides favourably has at least one compression section, or at
least one compression gap, respectively, which is smaller than 15
metres, preferably smaller than 10 metres. The device for producing
a corrugated cardboard web laminated on two sides favourably
comprises at least two in particular drivable compression rollers
or compression belts, respectively, which are disposed in pairs and
disposed so as to be mutually adjacent. The at least one corrugated
cardboard web laminated on one side and the lamination web are
guided through the compression section and are pressed against one
another therein. Glue for connecting the webs in a glued manner is
preferably located between said webs.
[0018] The terms "disposed upstream", "disposed downstream",
"upstream", "downstream", "behind one another" or the like used
here refer in particular to the conveying direction of the
respective conveyed web.
[0019] The processing temperatures of the glue of below 70.degree.
C. as claimed by the method according to the invention for
producing corrugated cardboard lead to particularly little energy
being required in order for the corrugated cardboard to be
produced. Furthermore, the webs to be glued, or to be connected,
respectively, are treated in a gentle manner. The glue has a
comparatively low bonding temperature or curing temperature,
respectively.
[0020] Bonding or curing, respectively, of the glue is performed in
particular when the latter is applied to the at least one
corrugated cardboard web laminated on one side, or immediately
thereafter, respectively, the glue receptacle region of said
corrugated cardboard web preferably having a temperature which is
sufficient for the glue to bond, cure, or dry, respectively.
Regions of the glue or of glue lines, respectively, herein
experience favourably temperatures of below 70.degree. C. both when
the glue is applied as well as thereafter. The processing
temperatures are favourably present on the at least one corrugated
cardboard web laminated on one side. In particular, the lamination
web is heated in a corresponding manner by the lamination web
printing assembly. Respective heating of the lamination web is
performed, for example, by at least one imprint drying device of
the lamination web printing assembly that is assigned to the
lamination web.
[0021] The corrugated cardboard plant configured such that the at
least one device for producing a respective corrugated cardboard
web laminated on one side, and the lamination web dispensing
device, and the lamination web printing assembly are disposed in
one row, in particular in a conveying direction of the corrugated
cardboard plant, is configured in a particularly simple manner. The
at least one device for producing a respective corrugated cardboard
web laminated on one side, and the lamination web dispensing
device, and the lamination web printing assembly, are favourably
disposed behind one another, or so as to be disposed downstream of
one another, respectively. A corrugated cardboard plant of this
type transversely to a conveying direction thus has an extremely
small width. The lamination web printing assembly is in particular
located within the actual corrugated cardboard plant.
[0022] The corrugated cardboard plant configured such that the
lamination web printing assembly is disposed below a bridge for
guiding the at least one corrugated cardboard web laminated on one
side in a direction towards the device for producing a corrugated
cardboard web laminated on two sides has a comparatively minor
requirement in terms of space. The length of said corrugated
cardboard plant is in particular comparatively short. Furthermore,
the lamination web printing assembly is thus not or barely exposed
to any external disturbing influences such as vibrations that are
generated by the device for producing a corrugated cardboard web
laminated on one side.
[0023] The bridge of the corrugated cardboard plant favourably has
a bridge height level of at least 4 metres in relation to a floor
or a hard surface, respectively. Said bridge, at least in a manner
adjacent to the lamination web printing assembly, preferably has a
bridge portion that is elevated on a frame. The bridge overall
favourably has a length which is smaller than 35 metres.
[0024] The at least one shield assembly of the bridge for reducing
a drying-up of the at least one corrugated cardboard web laminated
on one side that is guided in the bridge at least in regions
favourably extends along the bridge in a conveying direction of the
at least one corrugated cardboard web laminated on one side that is
conveyed there. Said at least one shield assembly in the conveying
direction preferably extends across at least 10 metres. Said at
least one shield assembly is preferably formed from a metallic
material or an insulation material, respectively.
[0025] The at least one shield assembly comprising at least one
side wall and/or cover is preferably closed off laterally and
towards the top. Said at least one shield assembly according to the
dependent claim 5 is preferably embodied as a housing or an
encapsulation, respectively. This particularly effectively prevents
a drying-up of the at least one corrugated cardboard web laminated
on one side in the bridge.
[0026] The assembly configured such that a bridge has a web run
correction assembly for correcting a web run of the at least one
corrugated cardboard web laminated on one side in the bridge,
wherein the web run correction assembly has a smaller horizontal
spacing from the device for producing a corrugated cardboard web
laminated on two sides than the lamination web printing assembly,
leads to an extremely high corrugated cardboard quality. In
particular, the at least one corrugated cardboard web laminated on
one side in terms of the position or location, respectively,
thereof is thus capable of being adapted or matched, respectively,
to the lamination web.
[0027] The design embodiment comprising a reversing assembly for
directing a print side of the lamination web downwards, wherein the
reversing assembly is disposed downstream of the lamination web
printing assembly and upstream of the device for producing a
corrugated cardboard web laminated on two sides, enables a simple
imprinting of the lamination web. The lamination web in the
lamination web printing assembly is in particular capable of being
imprinted from above. The reversing assembly is in particular
disposed downstream of a lamination web printing device of the
lamination web printing assembly.
[0028] The reversing assembly having at least one vertically
running reversing bar which preferably is horizontally displaceable
for correcting a web run of the lamination web permits a
particularly simple correction of the web run of the lamination
web, or a lateral deflection of the latter, respectively. This once
more leads to a particularly high corrugated cardboard quality.
[0029] A design embodiment without a reversing assembly is
alternatively possible.
[0030] The at least one re-humidification device for re-humidifying
the lamination web, wherein the re-humidification device is
disposed downstream of the lamination web printing assembly and
upstream of the device for producing a corrugated cardboard web
laminated on two sides, leads to an extremely positive planar
positioning of the lamination web and to particularly good adhesive
bonding of the lamination web to an adjacent corrugated cardboard
web laminated on one side in the device for producing a corrugated
cardboard web laminated on two sides. The at least one
re-humidification device ensures in particular a re-humidification
of at least 5 ml/m.sup.2.
[0031] The corrugated cardboard plant comprising a gluing unit for
gluing the at least one corrugated cardboard web laminated on one
side with glue, wherein the gluing unit is disposed downstream of
the lamination web printing assembly and, in particular so as to be
directly, adjacent to the lamination web printing assembly, in
particular in such a manner that the lamination web printing
assembly heats the lamination web in such a manner that the glue
applied by the gluing unit bonds, has a comparatively minor
requirement in terms of space. Furthermore, the requirement in
terms of energy of said corrugated cardboard plant is comparatively
minor. In particular, a pre-heating assembly for pre-heating the at
least one corrugated cardboard web laminated on one side and/or the
lamination web, in particular directly upstream of the device for
producing a corrugated cardboard web laminated on two sides, or of
the gluing unit, respectively, can thus be dispensed with. This can
in particular be traced back to a particularly short section being
present between the imprint by the lamination web printing device
and the device for producing a corrugated cardboard web laminated
on two sides. A spacing between the lamination web printing
assembly, or the lamination web printing device, respectively, and
the gluing unit is favourably smaller than 5 m. The lamination web
printing assembly has at least one dedicated heating element for
heating the lamination web, for example. The gluing unit can also
be the subject matter of an independent inventive subject
matter.
[0032] The glue used in the gluing unit, which permits processing
temperatures of below 70.degree. C., is capable of being processed
already at comparatively low temperatures, this also leading to
lower operating costs.
[0033] The lamination web printing assembly, or the at least one
lamination web printing device, respectively, configured such as to
heat the lamination web in such a manner that said lamination web
in the device for producing a corrugated cardboard web laminated on
two sides is connectable in a glued manner to the adjacent
corrugated cardboard web laminated on one side when imprinting
favourably heats the lamination web at least in portions to a
maximum of 120.degree. C., more preferably to 50.degree. C. to
70.degree. C. Heating in this manner is favourably performed when
drying the imprint.
[0034] The at least one heat protection assembly for protecting a
lamination printing device of the lamination web printing assembly
against thermal input favourably comprises a heat protection
material or a heat insulation material, respectively. Said at least
one heat protection assembly preferably extends between the
lamination web printing device and a drying device of the
lamination web printing assembly. This leads to a high printing
quality.
[0035] The design embodiment comprising a lamination web run
correction installation for correcting a web run of the lamination
web again leads to an extremely high corrugated cardboard quality.
In particular, a particularly good adaptation or matching,
respectively, of the lamination web to the at least one corrugated
cardboard web laminated on one side is thus possible. To this end,
the lamination web is favourably laterally deflectable. The
lamination web run correction installation is preferably disposed
upstream of the device for producing a corrugated cardboard web
laminated on two sides, or of a gluing unit, respectively. Said
lamination web run correction installation is favourably disposed
downstream of a lamination web printing device.
[0036] The web run correction installation comprising at least one
pivotable pivot roller is configured in a particularly simple
manner. The at least one pivot roller is favourably embodied as a
cambered roller. Said at least one pivot roller preferably extends
across a width of the lamination web. The lamination web preferably
bears circumferentially on the at least one pivot roller. The at
least one pivot roller is preferably deflectable in relation to the
lamination web in order for the web run of the lamination web to be
influenced.
[0037] The design embodiments discussed above can also relate to
preferred refinements of the method according to the invention for
producing corrugated cardboard.
[0038] Two preferred embodiments of the invention will be described
in an exemplary manner hereunder with reference to the appended
drawing.
BRIEF DESCRIPTION OF THE DRAWING
[0039] FIG. 1 shows a schematic lateral view of a corrugated
cardboard plant according to the invention;
[0040] FIG. 2 shows an enlarged fragment from FIG. 1, visualizing
in particular the lamination web printing assembly and components
of the corrugated cardboard plant that are adjacent to said
lamination web printing assembly;
[0041] FIG. 3 shows a lateral view corresponding to that of FIG. 1
of a corrugated cardboard plant according to the invention and
according to a second embodiment; and
[0042] FIG. 4 shows a fragment corresponding to that of FIG. 2 of
the corrugated cardboard plant according to FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0043] A corrugated cardboard plant shown in its entirety in FIG. 1
is capable of producing a continuous five-ply corrugated cardboard
web 1, or five-ply corrugated cardboard sheets, 2, respectively.
The corrugated cardboard plant overall is embodied in a
longitudinal manner. Said corrugated cardboard plant extends
substantially in a longitudinal direction or conveying direction 3,
respectively.
[0044] The corrugated cardboard plant comprises a first device 4
for producing a first corrugated cardboard web 5 laminated on one
side.
[0045] A first cover web splicing device 6 and a first material web
splicing device 7 are disposed upstream of the first device 4 for
producing a first corrugated cardboard web 5 laminated on one
side.
[0046] The first cover web splicing device 6 comprises a first
unwinding unit for unwinding a finite first cover web from a first
cover web roll 8, and a second unwinding unit for unwinding a
finite second cover web from a second cover web roll 9. The finite
first cover web and the finite second cover web are connected to
one another in the first cover web splicing device 6 in order for a
continuous first cover web to be provided.
[0047] The first material web splicing device 7 is configured in a
manner corresponding to that of the first cover web splicing device
6. Said first material web splicing device 7 comprises a third
unwinding unit for unwinding a finite first material web from a
first material web roll 10, and a fourth unwinding unit for
unwinding a finite second material web from a second material web
roll 11. The finite first material web and the finite second
material web are connected to one another in the first material web
splicing device 7 in order for a continuous first material web to
be provided.
[0048] The continuous first cover web is fed to the first device 4
for producing a first corrugated cardboard web 5 laminated on one
side by way of a first heating assembly 12, while the continuous
first material web is fed to the first device 4 for producing a
first corrugated cardboard web 5 laminated on one side by way of a
first deflection assembly 13.
[0049] The first device 4 for producing a first corrugated
cardboard web 5 laminated on one side, for generating a continuous
first corrugated web having a corrugation from the continuous first
material web, comprises a rotatably mounted first grooving roller
and a rotatably mounted second grooving roller. The grooving
rollers configure a first roller gap for guiding through and
grooving the continuous first material web. Said grooving rollers
conjointly form a first grooving assembly.
[0050] In order for the continuous first corrugated web to be
connected to the continuous first cover web so as to form the first
corrugated cardboard web 5 laminated on one side, the first device
4 for producing a first corrugated cardboard web 5 laminated on one
side has a first glue application installation which comprises a
first glue metering roller, a first glue container, and a first
glue application roller. The first glue application roller,
conjointly with the first grooving roller, configures a first gap
for guiding through and gluing the continuous first corrugated web.
The glue located in the first glue container is applied to tips of
the corrugation of the continuous first corrugated web by way of
the first glue application roller. The first glue metering roller
bears on the first glue application roller and serves for
configuring a uniform glue layer on the first glue application
roller.
[0051] The continuous first cover web in the first device 4 for
producing a first corrugated cardboard web 5 laminated on one side
is subsequently joined to the continuous first corrugated web
provided with glue from the first glue container.
[0052] In order for the continuous first cover web to be pressed
against the continuous first corrugated web provided with glue, the
latter web in turn in regions bearing on the first grooving roller,
the first device 4 for producing a first corrugated cardboard web 5
laminated on one side has a first contact pressure module. The
first contact pressure module is favourably embodied as a contact
pressure web module. Said first contact pressure module is disposed
above the first grooving roller. The first contact pressure module
has two first deflection rollers and a continuous first contact
pressure belt which is guided around the two first deflection
rollers.
[0053] The first grooving roller in regions engages from below into
a space that is present between the two first deflection rollers,
on account of which the first contact pressure belt is deflected by
the first grooving roller. The first contact pressure belt presses
against the continuous first cover web which in turn is pressed
against the continuous first corrugated web that is provided with
glue and bears on the first grooving roller.
[0054] In order for the first corrugated cardboard web 5 laminated
on one side to be further conveyed, said first corrugated cardboard
web 5 laminated on one side is fed to a bridge 15 of the corrugated
cardboard plant by way of a first elevated transportation
installation 14. The bridge 15 can also serve for the intermediate
storage and buffer storage of the first corrugated cardboard web 5
laminated on one side.
[0055] The corrugated cardboard plant moreover comprises a second
device 16 for producing a second corrugated cardboard web 17
laminated on one side.
[0056] A second cover web splicing device 18 and a second material
web splicing device 19 are disposed upstream of the second device
16 for producing a second corrugated cardboard web 17 laminated on
one side.
[0057] The second cover web splicing device 18 is configured in a
manner corresponding to that of the first cover web splicing device
6. Said second cover web splicing device 18 comprises a fifth
unwinding unit for unwinding a finite third cover web from a third
cover web roll 20, and a sixth unwinding unit for unwinding a
finite fourth cover web from a fourth cover web roll 21. The finite
third cover web and fourth cover web are connected to one another
in the second cover web splicing device 18 in order for a
continuous second cover web to be provided.
[0058] The second material web splicing device 19 is configured
like the first material web splicing device 7. Said second material
web splicing device 19 comprises a seventh unwinding unit for
unwinding a finite third material web from a third material web
roll 22, and an eighth unwinding unit for unwinding a finite fourth
material web from a fourth material web roll 23. The finite third
material web and fourth material web are connected to one another
in the second material web splicing device 19 in order for a
continuous second material web to be provided.
[0059] The continuous second cover web is fed to the second device
16 for producing a second corrugated cardboard web 17 laminated on
one side by way of a second heating assembly 24, while the
continuous second material web is fed to the second device 16 for
producing a second corrugated cardboard web 17 laminated on one
side by way of a second deflection assembly.
[0060] The second device 16 for producing a second corrugated
cardboard web 17 laminated on one side is configured in a manner
corresponding to that of the first device 4 for producing a first
corrugated cardboard web 5 laminated on one side. Said second
device 16 for producing a second corrugated cardboard web 17
laminated on one side, for generating a continuous second
corrugated web having a corrugation from the continuous second
material web, comprises a rotatably mounted third grooving roller
and a rotatably mounted fourth grooving roller. The grooving
rollers configure a second roller gap for guiding through and
grooving the continuous second material web. Said grooving rollers
conjointly form a second grooving assembly.
[0061] In order for the continuous second corrugated web to be
connected to the continuous second cover web so as to form the
second corrugated cardboard web 17 laminated on one side, the
second device 16 for producing a second corrugated cardboard web 17
laminated on one side has a second glue application installation
which comprises a second glue metering roller, a second glue
container, and a second glue application roller. The second glue
application roller, conjointly with the third grooving roller,
configures a second gap for guiding through and gluing the
continuous second corrugated web. The glue located in the second
glue container is applied to tips of the corrugation of the
continuous second corrugated web by way of the second glue
application roller. The second glue metering roller bears on the
second glue application roller and serves for configuring a uniform
glue layer on the second glue application roller.
[0062] The continuous second cover web in the second device 16 for
producing a second corrugated cardboard web 17 laminated on one
side is subsequently joined to the continuous second corrugated web
provided with glue from the second glue container.
[0063] In order for the continuous second cover web to be pressed
against the continuous second corrugated web provided with glue,
the latter web in turn in regions bearing on the third grooving
roller, the second device 16 for producing a second corrugated
cardboard web 17 laminated on one side has a second contact
pressure module. The second contact pressure module is favourably
embodied as a contact pressure belt module. Said second contact
pressure module is disposed above the third grooving roller. The
second contact pressure module has two second deflection rollers
and a continuous second contact pressure belt which is guided
around the two second deflection rollers.
[0064] The third grooving roller in regions engages from below into
a space that is present between the two second deflection rollers,
on account of which the second contact pressure belt is deflected
by the third grooving roller. The second contact pressure belt
presses against the continuous second cover web which in turn is
pressed against the continuous second corrugated web that is
provided with glue and bears on the third grooving roller.
[0065] In order for the second corrugated cardboard web 17
laminated on one side to be further conveyed, said second
corrugated cardboard web 17 laminated on one side is fed to the
bridge 15 by way of a second elevated transportation installation
26. The bridge 15 can also serve for the intermediate storage and
buffer storage of the second corrugated cardboard web 17 laminated
on one side.
[0066] The corrugated cardboard plant furthermore has a lamination
web splicing device 27 which is configured like the other splicing
devices 6, 7, 18, and 19, respectively. The lamination web splicing
device 27 comprises a ninth unwinding unit for unwinding a finite
first lamination web from a first lamination web roll 28, and a
tenth unwinding unit for unwinding a finite second lamination web
from a second lamination web roll 29. The finite first lamination
web and the finite second lamination web are connected to one
another in the lamination web splicing device 27 in order for a
continuous lamination web 30 to be provided. The continuous
lamination web 30 is single-ply.
[0067] A lamination web printing assembly 31 for imprinting the
lamination web 30, in terms of the lamination web 30, is disposed
downstream to the lamination web splicing device 27.
[0068] The lamination web printing assembly 31 comprises a corona
pre-treatment device 32 which is disposed on the entry side, or so
as to be adjacent to the lamination web splicing device 27,
respectively. The corona pre-treatment device 32 stands on a floor
or a hard surface, respectively. Said corona pre-treatment device
32 comprises a corona support roller 33 and at least one electrode
34 that is disposed so as to be adjacent to the latter. The corona
support roller 33 extends horizontally and perpendicularly to a
conveying direction 3 of the continuous lamination web 30. The
continuous lamination web 30 is guided around the corona support
roller 33. The continuous lamination web 30 herein runs through a
gap which is formed or delimited, respectively, by the corona
support roller 33 and by the at least one electrode 34. The
continuous lamination web 30, on account of the corona
pre-treatment device 32, is exposed to an electric corona
discharge, this leading to an oxidation of the surface of said
continuous lamination web 30, in particular on the print side. This
results in a comparatively high increase in pixels in a later
application of paint or in later imprinting, respectively. The
adhesion of a printing ink on the continuous lamination web 30 can
thus be improved.
[0069] The lamination web printing assembly 31 moreover has a
pre-coating application device 35 which in terms of the continuous
lamination web 30 is disposed downstream of the corona
pre-treatment device 32 and stands on a floor or a hard surface,
respectively. The pre-coating application device 35 is assigned to
the continuous lamination web 30 and is capable of applying a
planar pre-coating to an external side, or print side 36,
respectively, of the continuous lamination web 30. To this end, the
pre-coating application device 35 favourably utilizes at least one
pre-coating roller which extends horizontally and perpendicularly
to the conveying direction 3 of the continuous lamination web 30.
The at least one pre-coating roller is preferably submerged in a
pre-coating means that is capable of being applied.
[0070] The lamination web printing assembly 31 furthermore has a
pre-coating drying device 37 which in terms of the continuous
lamination web 30 is disposed downstream of the pre-coating
application device 35 and dries the pre-coating, or the continuous
lamination web 30, respectively, on the external side. The
pre-coating drying device 37 runs horizontally. Said pre-coating
drying device 37 is disposed above the corona pre-treatment device
32 and the pre-coating application device 35. The pre-coating
drying device 37 favourably has pre-coating drying installations
which are disposed behind one another, or in series,
respectively.
[0071] The lamination web printing assembly 31, in terms of the
continuous lamination web 30 downstream of the pre-coating drying
device 37, has a pivot roller 38 which forms a lamination web run
correction installation and is disposed so as to be adjacent to the
pre-coating drying device 37. The continuous lamination web 30 is
guided around the pivot roller 38. The pivot roller 38 extends in a
transverse direction, or a width direction, respectively, of the
continuous lamination web 30. Said pivot roller 38 preferably runs
horizontally. The angle of the pivot roller 38 in relation to the
continuous lamination web 30, or to the conveying direction 3
thereof, respectively, is variable, this leading to a corresponding
lateral deflection of the conveyed continuous lamination web
30.
[0072] The lamination web printing assembly 31 moreover has an ink
jet printing device 39 which in terms of the continuous lamination
web 30 is disposed downstream of the pivot roller 38. The ink jet
printing device 39 is assigned to the continuous lamination web 30
and is capable of imprinting at least one imprint on the continuous
lamination web 30, or on the dried pre-coating, respectively, on
the external side. The pre-coating is thus located between the at
least one imprint and the continuous lamination web 30. The at
least one imprint is favourably a colour imprint. Said at least one
imprint is located on the print side of the continuous lamination
web 30.
[0073] The ink jet printing device 39 comprises a central cylinder
40 which extends perpendicularly to the conveying direction 3 of
the lamination web 30, and horizontally. The ink jet printing
device 39 furthermore has an ink jet printing bar 41 having
printing heads which ink jet printing bar 41 in regions extends
about the central cylinder 40 so as to be spaced apart while
forming a printing gap 42. The continuous lamination web 30, in
order to be imprinted on the external side, is guided through the
printing gap 42.
[0074] The ink jet printing device 39 is at least largely disposed
in a housing-type heat-protection assembly 43. The ink jet printing
bar 41 is in particular completely accommodated in the
heat-protection assembly 43. The central cylinder 40 is preferably
at least largely accommodated in the heat-protection assembly 43.
Said heat-protection assembly 43 extends horizontally.
[0075] The lamination web printing assembly 31 moreover has an
infra-red drying device 44 which in terms of the continuous
lamination web 30 is disposed downstream of the ink jet printing
device 39 and is assigned to the continuous lamination web 30. The
infra-red drying device 44 extends horizontally and dries the
imprinted continuous lamination web 30, or the at least one imprint
of the latter, respectively, by means of infra-red radiation. The
infra-red drying device 44 is disposed below the ink jet printing
device 39, or the heat-protection assembly 43, respectively, and so
as to be adjacent thereto.
[0076] A hot air drying device 45 of the lamination web printing
assembly 31 in terms of the continuous lamination web 30 is
disposed downstream of the infra-red drying device 44, said hot air
drying device 45 being assigned to the continuous lamination web 30
and further drying the already somewhat dried continuous lamination
web 30, or the already somewhat dried imprint thereof,
respectively, by means of hot air. The hot air drying device 45
extends vertically and so as to be adjacent to the ink jet printing
device 39, or to the heat-protection assembly 43, respectively.
Said hot air drying device 45 is directly downstream of the
infra-red drying device 44.
[0077] The lamination web printing assembly 31 favourably has a
multiplicity of deflection rollers in order for the continuous
lamination web 30 to be guided between the individual components of
the lamination web printing assembly 31.
[0078] The corrugated cardboard plant, downstream of the hot air
drying device 45, has a re-humidification device 46 which is
assigned to the continuous lamination web 30 and which from above
humidifies said continuous lamination web 30 opposite to the print
side 36.
[0079] The lamination web printing assembly 31 is disposed below
the bridge 15. The bridge 15 has a support assembly 48 that runs so
as to be vertically spaced apart from the hard surface 47 and so as
to be parallel with the latter. The support assembly 48 extends
horizontally and determines a bridge height level. Said support
assembly 48 runs above the splicing devices 6, 7, 18, 19, 27 and
the devices 4, 16 for producing corrugated cardboard webs 5, 17
laminated on one side, and is supported in relation to said
devices.
[0080] The bridge 15 has a first elevated assembly 49 which in
relation to the support assembly 48 is elevated on a frame and
preferably extends above the second heating assembly 24, the second
device 16 for producing a second corrugated cardboard web 17
laminated on one side, the second material web splicing device 19,
and the lamination web splicing device 27, as well as the
lamination web printing assembly 31. The first corrugated cardboard
web 5 laminated on one side is conveyed on the first elevated
assembly 49. The first corrugated cardboard web 5 laminated on one
side therein is first conveyed upwards and then horizontally. The
first elevated assembly 49 can also be configured in another
manner, in particular so as to be longer or shorter.
[0081] The bridge 15 furthermore has a second elevated assembly 50
which in relation to the support assembly 48 is elevated on a frame
and runs below the first elevated assembly 49. The second elevated
assembly 50 preferably extends above the second material web
splicing device 19 and the lamination web splicing device 27 as
well as the lamination web printing assembly 31. The second
corrugated cardboard web 17 laminated on one side is conveyed on
the second elevated assembly 50. The second corrugated cardboard
web 17 laminated on one side therein is first conveyed upwards and
then horizontally. The second elevated assembly 50 can also be
configured in another manner, in particular so as to be longer or
shorter.
[0082] The lamination web printing assembly 31 is disposed below
the first elevated assembly 49 as well as below the second elevated
assembly 50 of the bridge 15. The pre-coating drying device 37 is
completely disposed above the support assembly 48. The ink jet
printing bar 41 and the hot air drying device 45 partially extend
above the support assembly 48. The corona pre-treatment device 32,
the pre-coating application device 35, the central cylinder 40, the
infra-red drying device 44, and the re-humidification device 46
extend below the support assembly 48 of the bridge 15.
[0083] A web run correction assembly 51, which comprises a first
web run correction device 52 assigned to the first corrugated
cardboard web 5 laminated on one side, and a second web run
correction device 53 assigned to the second corrugated cardboard
web 17 laminated on one side, is disposed in a downstream end
region on the bridge 15, or on the elevated assemblies 49, 50,
respectively. The first web run correction device 52 is capable of
influencing a web run of the first corrugated cardboard web 5
laminated on one side, or to cause a transverse deflection of the
latter, respectively. The second web run correction device 53 is
capable of influencing a web run of the second corrugated cardboard
web 17 laminated on one side, or to cause a transverse deflection
of the latter, respectively.
[0084] The web run correction assembly 51 is disposed above the hot
air drying device 45 and the re-humidification device 46. Said web
run correction assembly 51 in the conveying direction 3 is offset
in relation to the lamination web printing assembly 31.
[0085] A gluing unit 54 of the corrugated cardboard plant is
disposed downstream of the web run correction assembly 51 and of
the re-humidification device 46. The gluing unit 54 follows
directly downstream of the web run correction assembly 51 and the
re-humidification device 46. A horizontal spacing between the
lamination web printing assembly 31, or the ink jet printing device
39, respectively, and the gluing unit 54 is extremely minor, in
particular smaller than 5 m. In particular, a pre-heating assembly
which otherwise is disposed upstream of the gluing unit 54, as is
known, in order for the corrugated cardboard webs 5, 17 laminated
on one side, and the continuous lamination web 30, to be pre-heated
prior to being glued or adhesively bonded, respectively, to one
another, is absent. The continuous lamination web 30 is already
sufficiently heated by the active ink jet printing device 39.
[0086] The gluing unit 54 has a first gluing roller which is
partially submerged into a first glue bath. The first corrugated
cardboard web 5 laminated on one side, by way of the corrugated web
thereof, is in contact with the first gluing roller and is thus
provided with glue from the first glue bath. A first metering
roller bears circumferentially on the first gluing roller so as to
configure a uniform glue film on the first gluing roller.
[0087] The gluing unit 54 furthermore has a second gluing roller
which is partially submerged into a second glue bath. The second
corrugated cardboard web 17 laminated on one side, by way of the
corrugated web thereof, is in contact with the second gluing roller
and is thus provided with glue from the second glue bath. A second
metering roller bears circumferentially on the second gluing roller
so as to configure a uniform glue film on the second gluing
roller.
[0088] The continuous lamination web 30 in the gluing unit 54 runs
below the corrugated cardboard webs 5, 17 laminated on one
side.
[0089] The corrugated cardboard plant, downstream of the gluing
unit 54, has a compression device 55 which comprises an upper
compression belt that is guided over upper guide rollers, and a
lower compression belt that is guided over lower guide rollers. A
lower belt of the upper compression belt and an upper belt of the
lower compression belt run in a horizontal and mutually adjacent
manner. Said lower belt of the upper compression belt and said
upper belt of the lower compression belt configure a compression
section. The glued corrugated cardboard webs 5, 17 laminated on one
side and the continuous lamination web 30 are guided through the
compression section. The continuous corrugated cardboard web 1
which is laminated on two sides and has a total of five plies is
formed in the compression device 55, while the glue bonds or cures,
respectively.
[0090] The corrugated cardboard plant, downstream of the
compression device 55, has a short transverse cutting device 56
which comprises a knife cylinder and a counter cylinder disposed
below the latter. The knife cylinder and the counter cylinder are
mounted so as to be rotatable or drivable in a rotating manner,
respectively. The short transverse cutting device 56 is capable of
generating a cut which extends across the full width of the
continuous corrugated cardboard web 1. To this end, the knife
cylinder and the counter cylinder are set in rotation in such a
manner that said knife cylinder and said counter cylinder interact
with each other in the cutting procedure. The short transverse
cutting device 56 is furthermore capable of generating a cut having
a specific length and a specific spacing from a longitudinal
periphery of the continuous corrugated cardboard web 1. To this
end, counter-member elements of the counter cylinder are chosen or
adjusted in a corresponding manner, respectively. The knife
cylinder and the counter cylinder are set in rotation for the
cutting procedure in such a manner that a knife of the knife
cylinder interacts with the counter-member elements.
[0091] The corrugated cardboard plant, downstream of the short
transverse cutting device 56, has a longitudinal cutting/grooving
device 57 having two grooving units and two longitudinal cutting
units disposed downstream of the latter. The longitudinal cutting
units are capable of cutting the continuous corrugated cardboard
web 1 in the longitudinal direction 3 while forming corrugated
cardboard part-webs. The grooving units are capable of grooving the
continuous corrugated cardboard web 1 in order for any later
folding to be simplified.
[0092] The short transverse cutting device 56 is alternatively
disposed downstream of the longitudinal cutting/grooving device
57.
[0093] A turnout 58 of the corrugated cardboard plant is provided
downstream of the longitudinal cutting/grooving device 57, said
turnout 58 being provided for splitting the generated corrugated
cardboard part-webs in two different planes.
[0094] A transverse cutting device 59 having two partial transverse
cutting installations 60, 61 disposed on top of one another is
provided downstream of the turnout 58. Each partial transverse
cutting installation 60, 61 has two transverse cutting rollers that
are drivable in a rotating manner and disposed on top of one
another, said transverse cutting rollers extending perpendicularly
to the conveying direction 3 and having transverse cutting knives
that extend radially outwards in order for the respective
corrugated cardboard part-web to be completely severed in a
transverse manner, while generating corrugated cardboard
sheets.
[0095] A conveyor belt on which the corrugated cardboard sheets
imprinted on the external side are guided to form a respective
stack deposit 62 or 63, respectively is disposed downstream of each
partial transverse cutting installation 60, 61.
[0096] A second embodiment will be described hereunder with
reference to FIGS. 3, 4. As compared to the first embodiment,
reference to the description thereof herewith being explicitly
made, the lamination web printing assembly 31 is of a different
constructive design. While the sequence of the corona pre-treatment
device 32, the pre-coating application device 35, the pre-coating
drying device 37, the ink jet printing device 39, the infra-red
drying device 44, and the hot air drying device 45 is identical,
said devices are however placed differently in the corrugated
cardboard plant. The guiding of the continuous lamination web 30 in
the lamination web printing assembly 31 is also different.
[0097] The re-humidification device 46 is again disposed downstream
of the infra-red drying device 44. A reversing bar assembly 64
which is disposed below the web run correction assembly 51 and is
disposed upstream of the gluing unit 54, in terms of the continuous
lamination web 30 is disposed downstream of the re-humidification
device 46. The continuous lamination web 30 is guided around
reversing bars of the reversing bar assembly 64 in such a manner
that the print side 36 of the continuous lamination web 30
downstream of the reversing bar assembly 64 is directed downwards.
Prior thereto, the print side 36 is directed upwards.
* * * * *